Improved burglar-alarm



E 'F. MALLORY. Burglf Alarm.

No 68.520. Patented Sept. 3, 1867.

E. F. MALLORY, or WEST SPRINGFIELD, PENNSYLVANIA. Letters Patent No.68,520, dated September 3, 1867.

IMPROVED BURGLAR*ALARM.

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TO ALL WHOM IT MAY CONCERN:

Be it kno'wn that I, E. F.l\/IALLORY, of West Springfield, in the Countyof Erie, and State of Pennsylvania, have invented a newand usefulImprovement in Burglar-Alarm; and Ido hereby declare that the followingis a, full, clear, and exact description thereof, which will enablethose shilled in the artt0 make and use the same, reference being had tothe accompanying drawings, forming part of this specificaton.

The present invention relates to a hurglar-alarm that is so constructedand arranged in its several parts that as the do0ror window is opened towhich it is applied an alarm Will he sounded, as will be now described,reference being had to the aecompanying plate of drawings, in which-Figure 1 is a. side view of the device, and

Figure 2 a, plan or top view.

A, in the drawings, represents a spring having two arms, B and B looseat one end, but a t the other formed into one and the same coil C, forimpurting a spring to the nrin B". 'T0 the loose end of arm B a screw,D, is fixed by means of which the spring is fastened in place about adoor or window; the head E to this screw forming an anvil, asit were,forthe end of the right-angular beht port-ion F to the other nrm l3 tostrike upon. This end to bent prtion F is for carrying'a percussion-Capor Othere'xplosive inedim. Gr, a loop arranged to slide upon and overarm B to spring A, around the sdes of which it extends, and along itslength, toward the anvil-head of sorcw, where, being joined together, itpasses over the surface of anvil-block E between it and the nippIe-headF, with such nipple-head resting upon its inelined surface H, andterininates in a h0ok, I, at its extreme enter end.

In the attachment of the burglar-alarm above deseribedto a door, firstinsert the sorew in the door-casing up to its shoulder J, orthereahouts, and at about a foot or so above the knob or latch, leavingit straight or across the casing, when, draw the hook-loop forward untilits shonlder K nhuts against the head to the said screw, and then secureit by its hoo k I into the door a short distance from its edge. Now, ifthe door is opened, theend of the spring which rests upon the saidscrew-head will he'raisod, when the part attached to the door, becomingdetacherl from the part on the door-casing, the u'm B is left free tofall upon thscrew-liead, whereby the cap on the nipple-end thereto willbe snappcd or oxploderl,pro-lucing an alarm.

I claim as new, and desire to secure by Letters Patent A 1 Thecombination of the spring A, provided with anvilhead, iu combinationwith book-loop, when both are constructed and arranged together foroperation, substantially as 121d for the purpose described.

E. F. MALLORY.

Witnesses:

W. I. POTTER, S. A. HARRIS.

